Primary Structural Profiles & Prefab Core Envelopes
Direct mill delivery for certified light gauge and heavy structural framing members, fully verified against European harmonized standard EN 1090-1 and ASTM/GB specifications.
A36 / Q235B / Q355B Heavy H-Beam Columns
Precision wide-flange load-bearing columns and girders fabricated for multi-tier modular residential and commercial framing systems.
Perforated Galvanized Angle Bracing Profiles
Equal and unequal high-strength bracing angles pre-punched for rapid bolting and seismic stabilization joints in pre-engineered homes.
Galvanized Structural U / C Channel Steel
Hot-rolled and formed purlins offering unyielding perimeter support and floor decking track resistance for precast assembly integration.
Precision Q235B Solid Carbon Flat Bars
Engineered connection tie plates, stiffeners, and base anchor plates calibrated to custom shearing and drilling tolerances.
Q355B / S355 Cold Rolled Framing Coils
Optimized cold-formed steel coils suited for automated C/Z studs roll-forming machinery with minimal thickness tolerance variance.
PPGI Prepainted Coils for Insulated Panels
UV-resistant double-coated exterior cladding sheets designed to form energy-efficient insulated sandwich walls and roofing arrays.
DX51D–DX54D HDG Galvanized Coil Strip
Continuous hot-dip zinc galvanizing (up to Z275) preventing interior framing micro-corrosion for verified 50+ year structural lifespans.
Heavy ERW Galvanized Hollow Sections
Rigid hollow structural sections (HSS) delivering high torsional stiffness for prefabricated corner pillars and floor load integration.
Global Transformation of Industrialized Steel Frame Prefabrication
Technical White Paper: Offsite Manufacturing, Decarbonization Pressures, and European CE Execution Class Rigor
Architectural Shift to Offsite Construction
Traditional wet-construction sites face labor shortages, weather-induced delays, and volatile material loss rates. Steel frame prefabrication compresses building schedules by over 50%, transitioning construction into a controlled, machine-calibrated assembly line where sub-millimeter tolerances minimize on-site modifications.
Stringent CE Mark Compliance (EN 1090-1 / EN 10025)
For modular structures entering the European Economic Area, CE marking is mandatory under the Construction Products Regulation (CPR 305/2011). Suppliers must maintain a Factory Production Control (FPC) system certified to Execution Class 2 (EXC2) or Execution Class 3 (EXC3), encompassing traceable welding procedure specifications (WPS) and qualified personnel (WPQR).
Embodied Carbon & Life Cycle Assessment (LCA)
Steel provides complete cradle-to-cradle recyclability. When paired with thermal breaks, airtight insulation envelopes, and optimized framing profiles, steel prefab structures substantially lower operational heating/cooling loads while facilitating Environmental Product Declarations (EPD) required by progressive green building standards.
Global Enterprise Procurement Demands & Integrated EPC Solutions
Solving complex multi-disciplinary supply chain bottlenecks through consolidated mill-direct fulfillment, MEP pre-integration, and deep metallurgical processing.
Mining & Remote Energy Workforce Camps
Global resource developers operating in remote environments demand turnkey, modular living units capable of withstanding extreme thermal shifts (-40°C to +50°C), heavy snow loads, and corrosive saline environments without progressive structural deflection.
Government Social Housing & Disaster Relief
Rapid scalability is paramount. Utilizing pre-engineered standard building blocks fabricated from certified light gauge steel (LGS) framing, contractors can deploy thousands of housing square meters within weeks rather than months.
Commercial High-Bay & Logistics Hubs
Combining heavy hot-rolled primary columns (Q355B/S355JR H-Beams) with secondary cold-formed channel purlins allows clear interior spans over 30 meters, maximizing cubic storage density for modern automation-ready distribution centers.
Engineering Pricelist Matrix & Structural Cross-Reference
Indicative pricing benchmarks, steel chemistry grades, yield standards, and processing specifications. Note: Final FOB/CIF terms are calibrated based on current raw metallurgical indexing.
| Component Category | Material Grade Equivalent | Yield Strength (Min) | Surface Finish / Coating | Standard Dimensions | Indicative Price Range (FOB Tianjin) |
|---|---|---|---|---|---|
| Primary Columns (H-Beam) | GB Q355B / EN S355JR / ASTM A572 Gr.50 | ≥ 355 MPa | Shot Blasted Sa 2.5 + Primer / HDG | 100×100 to 900×300 mm | $620 – $760 / Ton |
| Light Gauge Studs (C/Z Purlin) | GB Q235B / EN S235JR / ASTM A36 | ≥ 235 MPa | Hot-Dip Galvanized Z120 – Z275 | 0.8 mm – 3.0 mm Thickness | $650 – $790 / Ton |
| Insulated Cladding Coils | DX51D+Z / SGCC / PPGI Core | Forming Quality | PE / PVDF Paint Coating (20/5 μm) | 0.3 mm – 0.8 mm × 1200 mm | $710 – $860 / Ton |
| Tubular Structural Sections | GB/T 6728 Q235B / ASTM A500 Gr.B | ≥ 235 – 310 MPa | Pre-Galvanized or HDG Treated | 40×40 to 300×300 mm Box | $640 – $780 / Ton |
| Reinforcement Bar Bundles | HRB400 / HRB500 / ASTM A615 Gr.60 | ≥ 400 – 500 MPa | Mill Scale / Clean Ribbed Wire | 6 mm to 32 mm Diameter | $560 – $690 / Ton |
| Turnkey Prefab Skeleton Pack | Full Project BOM Modular System | Multi-Grade Execution | Comprehensive CE Certified Pack | Custom Layout Drawing Based | $75 – $145 / m² (Floor Area) |
*Pricing is calculated based on current iron ore, zinc coating, and rolling energy metrics. Under GB/T 1591-2018, Q345 was fully transitioned to Q355B. All shipments include verified 3.1 Mill Test Certificates (MTC) and CE Declaration of Performance (DoP).
Localization Support, Metallurgical Testing & Quality Control
Mitigating cross-border operational risks through systematic third-party testing, certified welding inspections, and complete container stuffing optimizations.
Full Mill Test Certification (EN 10204 3.1)
Every single bundle dispatched from our Tianjin and Tangshan clusters is physically tagged with heat numbers corresponding to chemical heat analysis (C, Si, Mn, P, S) and mechanical testing results (Tensile, Yield, Elongation, and Charpy V-Notch Impact at -20°C).
In-House Precision Pre-Processing
Avoid expensive on-site field modifications. Our workshops execute computer-controlled saw cutting, plasma hole drilling, shear-plate welding, coping, and beveling. Steel arrives at destination job sites clean, numbered, and ready for immediate structural bolting.
Independent 3rd-Party Verification
We routinely facilitate third-party witness testing with leading international verification authorities including SGS, Bureau Veritas (BV), TÜV SÜD, and Intertek, covering ultrasonic weld inspection (UT), magnetic particle inspection (MT), and zinc coating thickness checks.
Technology Roadmap & Future Outlook (2025–2030)
The convergence of Building Information Modeling (BIM), artificial intelligence nesting algorithms, and advanced anti-corrosion metallurgy.
BIM-to-Machine CAD/CAM Interoperability
By connecting architectural IFC and Revit models directly to CNC roll-forming lines, automated production eliminates manual drafting errors. Cut lengths, service punch holes, and connection brackets are stamped with zero human translation variance.
High-Strength Zinc-Aluminum-Magnesium (ZAM) Coatings
Next-generation framing profiles are migrating toward continuous ZAM metallic alloy coatings. Providing self-healing edge corrosion resistance up to 3 times superior to traditional pure zinc galvanizing, ZAM ensures unmatched longevity in aggressive maritime or agricultural environments.
AI-Powered Container Stowage & Nesting
Logistics friction is minimized through proprietary algorithmic nesting. Mixed-profile bills of materials—combining heavy structural H-beams with light purlins, piping, and hardware accessories—are loaded with optimal weight distribution, avoiding container dead space and minimizing ocean freight expenditures.
Technical & Procurement FAQ for Overseas Buyers
Clear answers addressing engineering standards, containerized shipping logistics, customs verification, and mixed-cargo consolidation.
What specific CE certification standard applies to steel frame prefab homes?
In structural steel construction, CE certification is governed by EN 1090-1 (Execution of steel structures and aluminum structures) and EN 10025 (Hot rolled products of structural steels). To legitimately affix the CE Mark for the European Union, the manufacturer must possess an FPC (Factory Production Control) certificate issued by an accredited Notified Body, demonstrating compliance with Execution Class 2 (EXC2) or Execution Class 3 (EXC3) for dynamic or multi-story structures.
Where is HZXY located, and how does your cluster infrastructure benefit international freight?
HZXY is headquartered in the Daqiuzhuang Industrial Zone, Jinghai District, Tianjin, China—one of the largest concentrated steel processing hubs globally—with our second manufacturing base located in Tangshan. Our operational footprint spans over 1,500 acres. Because our rolling mills, galvanizing tanks, and finishing yards are situated minutes away from deep-water berths at Tianjin Port, we minimize domestic trucking fees and streamline ocean container stuffing.
Can we consolidate structural steel profiles, piping, and foundation rebar into a single container shipment?
Yes. This is one of HZXY's distinct competitive strengths. Rather than managing four separate sub-vendors, an EPC contractor or prefab assembler can consolidate H-beams, cold-formed purlins, galvanized scaffolding pipes, PVC drainage pipes, rebar, and industrial valves onto a single Bill of Lading (B/L). This drastically reduces port handling overhead, customs brokerage fees, and freight costs.
How do Chinese steel grades Q235B and Q355B match up against ASTM and European specifications?
Under GB/T standards, Q235B corresponds directly to European EN 10025-2 S235JR and American ASTM A36, having a minimum yield strength of 235 MPa. Grade Q355B (which officially superseded Q345 under GB/T 1591-2018) equates directly to EN S355JR and ASTM A572 Grade 50 with a yield strength of ≥ 355 MPa. Equivalent cross-references and full chemical composition reports are explicitly documented in all Mill Test Certificates.
What are your standard export payment instruments and Incoterms?
We regularly conduct international transactions under FOB Tianjin, CIF, and CFR terms according to Incoterms 2020. Payment settlement methods include Irrevocable Letters of Credit at Sight (L/C at sight) opened via top-tier global banks, as well as Telegraphic Transfers (T/T). Dedicated order managers oversee every production, testing, and shipping milestone.
Supplementary Infrastructure & Foundation Materials
Complete structural and MEP building products available for full bill-of-materials consolidation with your prefab framework package.
High-Strength Deformed Concrete Rebar (6–12 mm)
High-yield reinforcement steel bar bundles essential for foundation footing slabs, precast concrete plinths, and modular tie-down pads.
Corrosion-Resistant Galvanized Plain Round Bar
Precision straight round bars engineered for roof truss sag rods, foundation anchor studs, and cross-bracing structural systems.
SAE1080 / Q235 Hot Rolled Steel Wire Rod
Smooth high-drawability wire coils used for fabricating concrete mesh reinforcements, modular ties, and structural fastener hardware.
HDG Heavy Hot-Dip Galvanized Flat Steel (3–60 mm)
Thick zinc-coated structural flats designed for building electrical lightning grounding networks, brackets, and outdoor architectural fittings.
High-Strength Coated Steel Pipeline Tubing
High-pressure seamless and welded conduits engineered for district heating, fire main loops, and pressurized utility distribution.
Industrial Gate, Butterfly & Check Valves
Cast iron and stainless flange valves matched to pipe systems to provide complete sanitary, HVAC, and fire fighting MEP modules.
Custom Metal Prefab Connection Accessories
High-tensile Grade 8.8 and 10.9 structural bolts, corner casting connectors, washers, and specialized anchor hardware packages.
Standard Carbon ERW Black Steel Pipes
Clean mill-finish round structural tubing used for modular architectural railings, internal partition posts, and MEP pipe sleeves.
Request the Complete Technical Catalog & Custom Framing Quote
Connect directly with HZXY’s structural engineering export desk. We provide drawing take-offs, mill schedule allocations, and competitive ocean freight estimations within 24 business hours.